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solve cos(2x-4)=sin(6x)

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what's interval for x ?
i have no clue, im doing the work sheet and that is all it says for this question
it says solve for x

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Other answers:

remember complimentary angles
the answer choices are 20, -11, 10.75, or 11.75
forget your answers, understand concept
if just in the 1st quadrant. u can use the identity : cosx = sin(90-x) cos(2x-4)=sin(6x) sin(90-(2x-4))=sin(6x) 90-(2x-4) = 6x solve for x the result would be same like @dan817 said :)
oppss 815 not 817, hihi :)
hi :)
do u see how complimentary angles work now
in a right angled triangle the 2 other angles must add up to 90
Im really slow at picking up these concepts.....:/ so this im reallly lost..
hmm how else can i explain it
btw i really appriciate the help you guysss!!
no lets do it between 4 to pi+4 for 1 interval of your cos(2x-4)
hmmm.. for easier, solve this algebrically :) can u solve for x, this part : |dw:1371574314002:dw|
first solve an x that works and ill show u how u can find all the other xs that work
cos(2x-4)=cos(90-6x) a)2x-4=90-6x+360k b)2x-4=6x-90+360k a)x=94/8+45k b)x=86/4+90k

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